MET Questions Flashcards
Lowest layer of atmosphere is:
(a) Troposphere
(b) Tropopause
(c) Stratosphere
(a) Troposphere
Height of Tropopause at equator is:
(a) 10-12 km
(b) 16-18 km
(c) 12-14 km
(b) 16-18 km
Height of Tropopause at Poles is:
(a) 12-14 km
(b) 12-13 km
(c) 08-10 km
(c) 08-10 km
Higher the surface temperature, ______ would be the tropopause:
(a) Higher
(b) Lower
(c) Same
(a) Higher
Height of tropopause:
(a) Is constant
(b) Varies with altitude
(c) Varies with Latitude
(b) Varies with altitude
Above 8 km the lower temperatures are over:
(a) Equator
(b) Mid Latitudes
(c) Poles
(c) Poles
Atmosphere is heated by:
(a) Solar Radiation
(b) Heat from earth surface
(c) From above
(a) Solar Radiation
Tropos means:
(a) Turning
(b) Under current
(c) Convection
(a) Turning
CO₂ and H₂O are also called:
(a) Green House Gases
(b) Rare Earth Gases
(a) Green House Gases
Troposphere is generally:
(a) Stable
(b) Unstable
(c) Neutral
(a) Stable
Stratosphere is:
(a) Unstable
(b) Neutral
(c) Stable
(c) Stable
Tropopause is discontinuous at about:
(a) 30° lat
(b) 40° lat
(c) 80° lat
(a) 30° lat
Most of atmospheric mass is contained in:
(a) Troposphere
(b) Stratosphere
(c) Heterosphere
(a) Troposphere
Stratosphere extends from Tropopause to:
(a) 50 km
(b) 60 km
(c) 40 km
(b) 60 km
The middle atmosphere layer with temperature inversion and stability is:
(a) Troposphere
(b) Tropopause
(c) Stratosphere
(c) Stratosphere
Mother of Pearl clouds occur in:
(a) Mesosphere
(b) Thermosphere
(c) Stratosphere
(c) Stratosphere
The temperature in ISA at 17 km is:
(a) -56.5°C
(b) -65.5°C
(c) -35.5°C
(a) -56.5°C
By weight, approximate ratio of O₂ to N₂ in the atmosphere is:
(a) 1:3
(b) 1:4
(c) 1:5
(b) 1:4
By volume, the approximate ratio of O₂ to N₂ in the atmosphere is:
(a) 1:3
(b) 1:4
(c) 1:5
(c) 1:5
By volume, the proportion of CO₂ in the atmosphere is:
(a) 3%
(b) 0.3%
(c) 0.03%
(c) 0.03%
In ISA, the mean sea level temperature is:
(a) 15°C
(b) 10°C
(c) 25°C
(a) 15°C
Maximum concentration of ozone is at a height of:
(a) 10-15 km
(b) 20-25 km
(c) 30-35 km
(b) 20-25 km
Additional oxygen is needed while flying above:
(a) 5000 ft
(b) 7000 ft
(c) 10,000 ft
(c) 10,000 ft
CO₂ and H₂O keep the atmosphere:
(a) Warm
(b) Cool
(c) Have no effect
(a) Warm
Noctilucent clouds occur in:
(a) Thermosphere
(b) Mesosphere
(c) Stratosphere
(b) Mesosphere
Temperature at 2 km is 0°C. What is ISA deviation?
(a) -5°C
(b) -02°C
(c) 03°C
(a) -5°C
Pressure at MSL is 1002.25 hPa. Find the ISA deviation (Actual - ISA):
(a) -11 hPa
(b) 10 hPa
(c) 12 hPa
(a) -11 hPa
In actual atmosphere temp. at 19 km is -60°C. Find the ISA deviation:
(a) 4.5°C
(b) -6.5°C
(c) -5.5°C
(b) -6.5°C
Nacreous clouds occur in:
(a) Thermosphere
(b) Mesosphere
(c) Upper Stratosphere
(c) Upper Stratosphere
The atmosphere up to 80 km has a nearly similar composition and is called the Homosphere. Its uniform composition is due to:
(a) Pressure
(b) Gravitation of earth
(c) Mixing due to turbulence
(c) Mixing due to turbulence
Half of the atmospheric air mass is contained ______ below:
(a) 20,000 ft
(b) 15,000 ft
(c) 10,000 ft
(b) 15,000 ft
In jet standard atmosphere, the Lapse Rate is:
(a) 2°C/1000 ft
(b) 2°C/km
(c) 5°C/km
(c) 5°C/km
The rate of fall of temperatures with height, called:
(a) Isothermal rate
(b) Inversion Rate
(c) Lapse Rate
(c) Lapse Rate
In actual atmosphere, the lapse rate could:
(a) Assume any value
(b) Fall up to 8 km
(c) Rise up to 50 km
(a) Assume any value
Tropical Tropopause extends from the equator to Lat. 35°–40°. Over India, it is at:
(a) 20–21 km
(b) 14–15 km
(c) 16–16.5 km
(c) 16–16.5 km
Lapse rate in the troposphere is produced by ______ and in the stratosphere by ______:
(a) Evaporation; condensation
(b) Rising air; solar radiation
(c) Terrestrial radiation; solar radiation
(d) Solar radiation; convection
(c) Terrestrial radiation; solar radiation
Most of the water vapor in the atmosphere is confined up to:
(a) Stratosphere
(b) 30,000 ft
(c) Mid troposphere
(d) Lower troposphere
(d) Lower troposphere
Negative lapse rate of temperature is:
(a) Isothermal rate
(b) Temperature rise with lowering height
(c) Temperature rise with height
(d) Temperature fall with height
(b) Temperature rise with lowering height
In ICAO ISA, the atmosphere is assumed to be isothermal:
(a) In stratosphere
(b) 11 to 16 km
(c) 11 to 32 km
(a) In stratosphere
One of the characteristics of our atmosphere is:
(a) Poor conductor of heat and electricity
(b) Lapse rate is warmer than poles above 10 km
(c) Lapse rate in the stratosphere is positive
(d) Density is constant above 8 km
(c) Lapse rate in the stratosphere is positive
Heat transfer in the atmosphere is maximum due to:
(a) Convection
(b) Radiation
(c) Sensible heat
(d) Latent heat
(d) Latent heat
The knowledge of the height of tropopause is important for a pilot because:
(a) Weather is mainly confined up to this level
(b) Clouds rarely reach up to this height due to jet streams
(c) Stratosphere starts at this height where all solar radiation are absorbed
(a) Weather is mainly confined up to this level
In ISA atmosphere, the tropopause occurs at a height of:
(a) 8–10 km
(b) 11 km
(c) 16–18 km
(b) 11 km
Most of the transfer of heat in the atmosphere is due to:
(a) Conduction and freezing
(b) Convection and evaporation
(c) Condensation, sublimation, and freezing
(d) Sublimation and radiation
(b) Convection and evaporation
There is reversal of temperature in the atmosphere at 8 km because:
(a) Lapse rate at poles is always higher than at equator
(b) Lapse rate at equator is always higher than at poles
(c) Lapse rate at equator is the same as at poles even above the poles
(d) Lapse rate reverses at poles and becomes negative
(d) Lapse rate reverses at poles and becomes negative
Winds in a low-pressure area (a) Converge (b) Diverge (c) Go straight
(a) Converge
Low pressure is associated with (a) Good Weather (b) Bad Weather (c) None
(b) Bad Weather
In a high-pressure area winds are (a) Normal (b) Strong (c) Weak
(c) Weak
Flying from Low to High an altimeter would read (a) Over (b) Under (c) Constant
(b) Under
Isallobars are lines of equal (a) Pressure (b) Temperature Tendency (c) Pressure Tendency
(a) Pressure
What kind of barometer is an altimeter (a) Aneroid (b) Mercury (c) Alcohol
(a) Aneroid
A region between two Lows and two Highs is (a) Depression (b) Secondary Low (c) Col
(c) Col
Bad weather and better visibility are associated with (a) High (b) Low (c) Col
(b) Low
The relationship between height and pressure is made use of in the construction of (a) Altimeter (b) ASI (c) VSI
(a) Altimeter
An altimeter always measures the height of the aircraft above (a) MSL (b) Datum of 1013.2 hPa (c) Datum at which its sub-scale is set
(b) Datum of 1013.2 hPa
Two aircraft flying at the same indicated altitude with altimeters set to 1013.2 hPa One is flying over a cold air mass and the other over a warm air mass Which of the two has greater altitude (a) Aircraft flying over a warm air mass (b) Aircraft flying over a cold air mass
(a) Aircraft flying over a warm air mass
The rate of fall of pressure with height in a warm air mass compared to a cold air mass will be (a) Same (b) More (c) Less
(b) More
An increase of 1000 ft at MSL is associated with a decrease of pressure of (a) 100 hPa (b) 1000 hPa (c) 3 hPa (d) 33 hPa
(c) 3 hPa
Altimeter always measure the height of aircraft above (a) MSL (b) datum of 1013.2 hPa (c) datum at which its sub-scale is set
(b) datum of 1013.2 hPa
Two aircraft flying at the same indicated altitude with altimeters set to 1013.2 hPa. One is flying over cold air mass and other over warm air mass. Which of the two has greater altitude? (a) Ac flying over warm air mass (b) Ac flying over cold air mass
(a) Ac flying over warm air mass
The rate of fall of pressure with height in a warm air mass compared to cold air mass will be (a) Same (b) More (c) Less
(b) More
An increase of 1000 ft at MSL is associated with decrease of pressure of (a) 100 hPa (b) 1000 hPa (c) 3 hPa (d) 33 hPa
(c) 3 hPa
24,000 ft height in ISA corresponds to pressure level (a) 400 hPa (b) 500 hPa (c) 300 hPa
(b) 500 hPa
700 hPa in ISA corresponds to the Flight level (a) 20,000 ft (b) 10,000 ft (c) 18,000 ft
(c) 18,000 ft
40,000 ft height in ISA approximately corresponds to pressure level (a) 400 hPa (b) 500 hPa (c) 200 hPa
(c) 200 hPa
850 hPa in ISA corresponds to the height (a) 7,000 ft (b) 5,000 ft (c) 10,000 ft
(c) 10,000 ft
Atmospheric pressure is due to (a) wind (b) temperature (c) gravity (d) density
(c) gravity
An aircraft is gaining altitude, inspite of altimeter reading constant altitude. Why? (a) Standard pressure has risen (b) Flying towards High (c) Flying towards Low (d) Temperature has decreased
(d) Temperature has decreased
A contour of 9160 m can be expected on a constant pressure chart for pressure level (a) 500 hPa (b) 400 hPa (c) 300 hPa (d) 200 hPa
(a) 500 hPa
In contour chart of 300 hPa, isohypse (contours) are drawn at interval of (a) 20 gpm (b) 40 gpm (c) 60 gpm (d) 80 gpm
(c) 60 gpm
In constant pressure chart of 500 hPa, isohypse are drawn at interval of (a) 20 gpm (b) 40 gpm (c) 60 gpm (d) 80 gpm
(b) 40 gpm
QNH of an aerodrome 160 m AMSL is 1005 hPa. QFE? Assuming 1 hPa=8m (a) 1010 hPa (b) 985 hPa (c) 1005 hPa (d) 990 hPa
(b) 985 hPa
Steep pressure gradient would mean (a) Contours far apart, weak wind (b) Contours far apart, strong wind (c) Isobars far apart and temperature low (d) Isobars closely packed and strong wind
(d) Isobars closely packed and strong wind
Water vapor is transparent to terrestrial radiation (a) completely (b) partially (c) indifferent
(b) partially
Higher the temperature _______ would be the wavelength of emitted radiation (a) longer (b) shorter
(b) shorter
Air is a bad conductor of heat. A parcel of air can therefore be regarded as insulated from the environment (a) False (b) True
(b) True
Warmer the earth _______ will be the Nocturnal radiation (a) intense (b) weaker (c) moderate
(a) intense
Heat is the ______ of the KE of all the molecules and atoms of a substance (a) sum total (b) average
(b) average
The solar radiation consists of about 46% ______ (a) UV (b) IR (c) Visible
(c) Visible
The total energy radiated by a black body is proportional to its temperature (T) (a) T^2 (b) T^3 (c) T^4
(c) T^4
Intense radiation are emitted by (a) Hot bodies (b) Cold bodies (c) Stars
(a) Hot bodies
The wavelength of most intense radiation is inversely proportional to its ______ (a) Absolute temperature (b) Humidity (c) Albedo
(a) Absolute temperature
Hot bodies (like sun) radiate (a) Short Waves (b) Long Waves (c) Both
(a) Short Waves
The flow of heat from earth surface is 77% by (a) Sensible Heat (b) Latent Heat
(a) Sensible Heat
-40°C = -40°F (a) True (b) False
(a) True
Surface Temperature is recorded at a height of ______ above ground (a) 1.5 m (b) 1.25 m (c) 2 m
(c) 2 m
The door of Stevenson’s screen should open (a) opposite to sun (b) into sun (c) any direction
(a) opposite to sun
The liquid used in Minimum Thermometer is (a) mercury (b) alcohol (c) sprit
(b) alcohol
Freezing point of water is (a) 0°F (b) 12°F (c) 22°F (d) 32°F
(d) 32°F
The wind sliding down a hill during night is called _______ wind (a) Fohen (b) Anabatic (c) Katabatic
(c) Katabatic
With the onset of sea breeze there is a _______ in temperature and _______ in RH (a) Fall/Rise (b) Rise/Fall (c) Fall/Fall
(a) Fall/Rise
Sea breeze sets in by _______ and dies off at _______ (a) Night/Day (b) Day/Night (c) Both Day and Night
(b) Day/Night
If an aircraft in N-hemisphere flies from H to L it will experience (a) Starboard drift (b) Port drift
(b) Port drift
In N-Hemisphere if you experience Port drift, altimeter will read (a) Under (b) Over
(b) Over
Lines of constant wind speed drawn on weather charts are called (a) Isobars (b) Isotachs (c) Isogons
(b) Isotachs
Squall are distinguished from gusts by (a) Shorter duration (b) Longer duration (c) Lower wind speed
(b) Longer duration
The thermal wind is (a) The wind that blows because of thermals (b) The warm wind that blows down the hill on the leeward side (c) The wind which must be added vectorially to the lower level geostrophic wind to obtain the upper level geostrophic wind
(c) The wind which must be added vectorially to the lower level geostrophic wind to obtain the upper level geostrophic wind
On a weather map if isobars are closely packed, the surface winds are likely to be (a) Light and parallel to isobars (b) Strong and parallel to isobars (c) Strong and blowing across the isobars
(c) Strong and blowing across the isobars
Anabatic wind occurs (a) At night (b) Any time of day and night (c) During day
(c) During day
A change in wind direction from 310° to 020° is (a) Backing (b) Veering
(b) Veering
A change from 270° to 250° is (a) Backing (b) Veering
(a) Backing
Sudden changes in wind speed from 10 kt to 30 kt and then to 15 kt are (a) Gust (b) Squall (c) Gale
(b) Squall
Sudden change in wind speed from 10 kt to 30 kt for 2-3 minutes (a) Squall (b) Gust
(b) Gust
A significant wind shear is generally associated with TS or line squall (a) False (b) True
(b) True
Cyclostrophic wind gives a good approximation of the 2000’ wind in an intense tropical storm (a) True (b) False
(a) True
Rotor clouds have extremely turbulent flying conditions (a) False (b) True
(b) True
Friction causes winds to flow cross isobaric by ______ over land and ______ over sea (a) 10°, 5° (b) 30°, 10° (c) 20°, 15°
(a) 10°, 5°
The ratio in % between the amount of water vapor present in the air to the amount of water vapor that it can hold at the same temperature is (a) Humidity (b) Relative humidity (c) Dew point
(b) Relative humidity
The temperature to which air be cooled at constant pressure to become saturated is called (a) Wet bulb temperature (b) Dry bulb temperature (c) Dew point
(c) Dew point
Free air temperature, wet bulb temperature and dew point temperature are equal when (a) Air temperature is 0°C (b) Relative humidity is 100% (c) Air temperature is not below 0°C
(b) Relative humidity is 100%
QNH of an aerodrome at 160 m AMSL is 1005 hPa. QFE assuming 1 hPa = 8 m (a) 1010 hPa (b) 985 hPa (c) 1005 hPa
(b) 985 hPa
The wind sliding down a hill during night is called (a) Fohen (b) Anabatic (c) Katabatic
(c) Katabatic
The onset of sea breeze brings a ______ in temperature and a ______ in RH (a) Rise/Fall (b) Fall/Rise (c) Fall/Fall
(b) Fall/Rise
Sea breeze sets in by ______ and dies off at ______ (a) Night/Day (b) Day/Night (c) Both day and night
(b) Day/Night
If an aircraft in the Northern Hemisphere flies from High to Low it will experience (a) Starboard drift (b) Port drift
(b) Port drift
In Northern Hemisphere, if you experience port drift, the altimeter will read (a) Under (b) Over
(b) Over
Lines of constant wind speed drawn on weather charts are called (a) Isobars (b) Isotachs (c) Isogons
(b) Isotachs
A squall is distinguished from gusts by (a) Shorter duration (b) Longer duration (c) Lower wind speed
(b) Longer duration
The thermal wind is (a) The wind that blows because of thermals (b) The warm wind that blows down the hill on the leeward side (c) The wind which must be added vectorially to the lower level geostrophic wind to obtain the upper level geostrophic wind
(c) The wind which must be added vectorially to the lower level geostrophic wind to obtain the upper level geostrophic wind
On a weather map, if isobars are closely packed, the surface winds are likely to be (a) Light and parallel to isobars (b) Strong and parallel to isobars (c) Strong and blowing across the isobars
(c) Strong and blowing across the isobars
Anabatic wind occurs (a) At night (b) Any time of day and night (c) During day
(c) During day
A change in wind direction from 310° to 020° is (a) Backing (b) Veering
(b) Veering
A change from 270° to 250° is (a) Backing (b) Veering
(a) Backing
Sudden changes in wind speed from 10 kt to 30 kt and then to 15 kt are (a) Gust (b) Squall (c) Gale
(b) Squall
Sudden change in wind speed from 10 kt to 30 kt for 2-3 minutes (a) Squall (b) Gust
(b) Gust
A significant wind shear is generally associated with thunderstorms or line squalls (a) False (b) True
(b) True
Cyclostrophic wind gives a good approximation of the 2000’ wind in an intense tropical storm (a) True (b) False
(a) True
Rotor clouds have extremely turbulent flying conditions (a) False (b) True
(b) True
Friction causes winds to flow cross isobaric by ______ over land and ______ over sea (a) 10°, 5° (b) 30°, 10° (c) 20°, 15°
(a) 10°, 5°
The ratio in % between the amount of water vapor present in the air to the amount of water vapor that it can hold at the same temperature is (a) Humidity (b) Relative humidity (c) Dew point
(b) Relative humidity
The temperature to which air be cooled at constant pressure to become saturated is called (a) Wet bulb temperature (b) Dry bulb temperature (c) Dew point
(c) Dew point
Free air temperature, wet bulb temperature and dew point temperature are equal when (a) Air temperature is 0°C (b) Relative humidity is 100% (c) Air temperature is not below 0°C
(b) Relative humidity is 100%
The onset of katabatic winds during the night causes cooling along the slope (a) False (b) True
(b) True
Anabatic winds stronger than katabatic (a) True (b) False
(b) False
Katabatic wind is down slope cold wind due to nocturnal cooling (a) True (b) False
(a) True
Katabatic wind occur due to sinking of cold air down the hill slope (a) True (b) False
(a) True
Anabatic wind occur due to downward movement of air along valley (a) True (b) False
(a) True
Sea breeze is stronger than land breeze (a) True (b) False
(a) True
The wind blows clockwise around a low in N-hemisphere (a) True (b) False
(b) False
The wind blows clockwise around a low in S-hemisphere (a) True (b) False
(b) False
The wind blows anticlockwise around a low in N-hemisphere (a) True (b) False
(a) True
The wind blows anticlockwise around a low in S-hemisphere (a) True (b) False
(a) True
The resultant wind that blows under the influence of pressure gradient force, geostrophic force and cyclostrophic force is called (a) Gradient wind (b) Geostrophic wind (c) Cyclostrophic wind
(b) Geostrophic wind
Due to friction, from day to night for an isobaric pattern (in N hemisphere) the surface wind backs and weakens (a) True (b) False
(a) True
The winds which spiral inward counter-clockwise in the N Hemisphere are associated with (a) Turbulence (b) High pressure area (c) Low pressure area
(c) Low pressure area
Lower level wind 05010 kt, upper level wind 23005 kt, what is the thermal wind (a) 05005 kt (b) 23015 kt (c) 05015 kt
(b) 23015 kt
In N hemisphere thermal wind is parallel to _______ with low value to left (a) Isobars (b) Isotherms (c) Isallobars
(a) Isobars
The inertial flow is (a) Cyclonic in both the Hemispheres (b) Anticyclonic in both the Hemispheres (c) Anticyclonic around an anticyclone
(b) Anticyclonic in both the Hemispheres
Upper level wind is 24025 kt, lower level wind is 06015 kt, the thermal wind is (a) 16010 kt (b) 24040 kt (c) 24010 kt
(b) 24040 kt
The Beaufort Force (BF) Scale as adopted by Admiral Beaufort to estimate wind force includes (a) Calm (b) Light air (c) Light breeze (d) All of these
(d) All of these
The BF Scale ‘Calm’ corresponds to wind speed at 10m of (a) <1 kt (b) 1-3 kt (c) 4-6 kt
(a) <1 kt
BF Scale 1 ‘Light air’ corresponds to wind speed at 10m of (a) 1-3 kt (b) 4-6 kt (c) 7-10 kt
(a) 1-3 kt
BF Scale 2 ‘Light breeze’ corresponds to wind speed at 10m of (a) 4-6 kt (b) 7-10 kt (c) 11-16 kt
(a) 4-6 kt
BF Scale 3 ‘Gentle breeze’ corresponds to wind speed at 10m of (a) 7-10 kt (b) 11-16 kt (c) 17-21 kt
(a) 7-10 kt
BF Scale 4 ‘Moderate breeze’ corresponds to wind speed at 10m of (a) 11-16 kt (b) 17-21 kt (c) 22-27 kt
(a) 11-16 kt
BF Scale 5 ‘Fresh breeze’ corresponds to wind speed at 10m of (a) 17-21 kt (b) 22-27 kt (c) 28-33 kt
(a) 17-21 kt
BF Scale 6 ‘Strong breeze’ corresponds to wind speed at 10m of (a) 22-27 kt (b) 28-33 kt (c) 34-40 kt
(b) 28-33 kt
BF Scale 7 ‘Near gale’ corresponds to wind speed at 10m of (a) 28-33 kt (b) 34-40 kt (c) 41-47 kt
(b) 34-40 kt
BF Scale 8 ‘Gale’ corresponds to wind speed at 10m of (a) 34-40 kt (b) 41-47 kt (c) 48-55 kt
(b) 41-47 kt
BF Scale 9 ‘Strong gale’ corresponds to wind speed at 10m of (a) 41-47 kt (b) 48-55 kt (c) 56-63 kt
(b) 48-55 kt
BF Scale 10 ‘Storm’ corresponds to wind speed at 10m of (a) 48-55 kt (b) 56-63 kt (c) 64 or more kt
(b) 56-63 kt
BF Scale 11 ‘Violent storm’ corresponds to wind speed at 10m of (a) 56-63 kt (b) 64 or more kt
(b) 64 or more kt
BF Scale 12 ‘Hurricane’ corresponds to wind speed at 10m of (a) 64 or more kt (b) 55-60 kt
(a) 64 or more kt
Fog is reported when visibility is reduced to (a) Less than 1000 m (b) 1000 m (c) 1000 to 2000 m
(a) Less than 1000 m
RVR is reported when visibility falls below (a) 500 m (b) 1000 m (c) 1500 m (d) 2000 m
(b) 1000 m
Radiation fog occurs (a) Over land (b) Over sea (c) During day
(a) Over land
When visibility reduces between 5000 m and 1000 m and RH is almost 100%, it is (a) Mist (b) Haze (c) Fog
(a) Mist
Radiation Fog forms over N India during (a) May to June (b) Dec to Feb (c) Oct to Nov
(b) Dec to Feb
Warm and moist air moving over a cold ground gives rise to (a) Thunder clouds (b) Fog and stratus (c) Frontal clouds
(b) Fog and stratus
Warm and moist air moving over a cold surface causes (a) Radiation Fog (b) Advection Fog (c) Frontal Fog
(b) Advection Fog
The radiation fog forms due to (a) Heating of the earth during day (b) Radiational cooling of earth at night (c) Advection of cold air
(b) Radiational cooling of earth at night
The radiation fog activity increases after the passage of a (a) WD (b) Depression (c) Col
(b) Depression
Radiation fog is essentially a ______ phenomenon (a) Nocturnal (b) Dusk (c) Daytime
(a) Nocturnal
The radiation fog forms over (a) Water (b) Land (c) Both
(c) Both
The ______fog forms due to horizontal movement of warm moist air over cold surface (a) Radiation (b) Advection (c) Frontal
(b) Advection
Advection fog forms during (a) Night only (b) Day time only (c) Any time of day and night
(c) Any time of day and night
For formation of Radiation fog (a) There should be sufficient moisture in atmosphere, cloudy sky, nil wind (b) There should be sufficient moisture in atmosphere, clear sky, light wind (c) There should be sufficient moisture in atmosphere, cloudy sky, strong wind
(a) There should be sufficient moisture in atmosphere, cloudy sky, nil wind
Instrument used for measuring visibility is called (a) Visiometer (b) Transmissometer (c) Ceilometer
(b) Transmissometer
Advection fog forms (a) Over sea (b) Over land (c) Both over land and sea
(c) Both over land and sea
Fog is ______ cloud on ground (a) Stratocumulus (b) Stratus (c) Nimbostratus
(b) Stratus
Frontal Fog is more common with a (a) Western Disturbance (b) Cyclone (c) Warm Front (d) Cold Front
(c) Warm Front
The favorable pressure system for formation of fog is (a) Lows and Cols (b) High and Trough (c) Highs and Cols
(a) Lows and Cols
Thermal processes/temperature distribution which favors formation of fog is (a) Isothermal (b) Adiabatic (c) Inversion (d) SALR
(c) Inversion
Drizzle occurs from (a) CS (b) ST (c) NS (d) CU
(a) CS
Altostratus (AS) is (a) Low cloud of sheet type (b) A medium cloud of sheet type (c) A cloud of large vertical growth (d) A high cloud of sheet type
(b) A medium cloud of sheet type
Showers occur from (a) CU (b) CB (c) AS (d) AC
(b) CB
Heavy icing is possible in (a) CI (b) CS (c) ST (d) CB
(d) CB
To avoid icing in cloudy conditions, a pilot is advised to fly through a cloud which shows optical phenomena (a) Halo (b) Corona (c) With multi-colored clouds (d) CB
(c) With multi-colored clouds
Dark gray cloud giving continuous rain is called (a) AS (b) NS (c) ST (d) CS
(b) NS
A uniform layer of cloud resembling fog but not on the ground (a) AS (b) NS (c) ST
(b) NS
The clouds composed of ice crystals having feathery appearance (a) CI (b) CS (c) AS
(a) CI
NS clouds occur (a) At cold front (b) At warm front
(b) At warm front
Halo is associated with the cloud (a) AC (b) AS (c) CI
(c) CI
Corona is associated with the cloud (a) AS (b) AC (c) CC
(a) AS
Lenticular clouds indicate presence of (a) Warm Front (b) Cold Front (c) Mountain waves
(c) Mountain waves
The lowest level below which condensation trails will not form is (a) Mintra Level (b) Drytra Level (c) Maxtra Level
(b) Drytra Level
Rain falling from cloud but not reaching ground is (a) Virgo (b) Virga (c) Mirage
(b) Virga
CB with distinct anvil is called (a) Castellaneous (b) Capillatus (c) Uncinus
(b) Capillatus
Cloud ceiling is the height of the cloud covering _______ (a) 3-4/8 (b) 4/8 (c) 5/8 or more
(c) 5/8 or more
No condensation trails occur above (a) Maxtra Level (b) Drytra Level (c) Mintra Level
(a) Maxtra Level
Cloud of operational significance has base 1000 m or below the highest minimum sector altitude, which is greater (a) 1500 (b) 2000
(a) 1500
AC cloud with cumuliform protuberances are indicative of (a) Stability (b) Instability (c) Neutrality
(b) Instability
Hail may be experienced under the anvil of a CB (a) True (b) False
(a) True
DALR = 9.8 °C ELR = 6.8 °C atmosphere is (a) stable (b) unstable (c) indifferent
(b) unstable
SALR = 5.5 °C ELR = 4.5 °C atmosphere is (a) unstable (b) stable (c) indifferent
(b) stable
DALR > ELR > SALR (a) conditionally unstable (b) latently stable (c) potentially stable
(a) conditionally unstable
Dry air is unstable when (a) ELR=DALR (b) ELR>DALR (c) ELR<DALR
(b) ELR>DALR
The saturated air is said to be unstable if (a) SALR=ELR (b) SALR<ELR (c) SALR>ELR
(c) SALR>ELR
If ELR = SALR = DALR the atmosphere is (a) Stable (b) Instable (c) Indifferent
(a) Stable
DALR means (a) The rate at which temperature of unsaturated parcel of air falls with height when made to ascend adiabatically (b) The rate at which temp falls with height (c) The rate at which ascending parcel of saturated air cools
(a) The rate at which temperature of unsaturated parcel of air falls with height when made to ascend adiabatically
Surface temp is 30° C Assuming DALR what is the temperature at 2 km (a) 18°C (b) 10°C (c) 42°C
(a) 18°C
An Isothermal atmosphere is (a) Stable (b) Unstable (c) Neutral
(a) Stable
If ELR is less than SALR the atmosphere is said to be (a) Absolutely unstable (b) Conditionally unstable (c) Absolutely stable
(b) Conditionally unstable
DALR is approximately (a) 5 °C/km (b) 15 °C/km (c) 10 °C/km
(c) 10 °C/km
SALR at mean sea level is about (a) 10 °C/km (b) 5 °C/km (c) 5 °F/km
(b) 5 °C/km
SALR approaches DALR at (a) 0°C (b) -15°C (c) at -40°C
(a) 0°C
Dry air having a temperature of 35°C on surface when forced to rise adiabatically by 1 km would attain a temperature of (a) 29°C (b) 25°C (c) 45°C
(a) 29°C
Inversion in the atmosphere indicates (a) Stability (b) Instability (c) Neutrality
(a) Stability
Inversion is _______ Lapse Rate (LR) (a) Positive (b) Negative (c) Neutral
(a) Positive
Environmental LR can be more than DALR (a) True (b) False
(a) True
The process which to a large extent determines the vertical distribution of temperature in atmosphere is (a) Adiabatic (b) Isothermal (c) Isentropic
(a) Adiabatic
Rise in temperature with height is (a) Inversion (b) Lapse (c) Normal
(a) Inversion
Inversion is common in (a) Post Monsoon (b) Monsoon (c) Winters
(a) Post Monsoon
Aurora Australis occur in the (a) S hemisphere (b) N hemisphere (c) Equator
(a) S hemisphere
Aurora Australis called ……….. Lights (a) Northern (b) Southern (c) Temperate
(b) Southern
Aurora Borealis occur in the (a) S hemisphere (b) N hemisphere (c) Equator
(b) N hemisphere
Aurora Borealis are called ……….. Lights (a) Northern (b) Southern (c) Temperate
(a) Northern
Corona occur in ……….. clouds (a) AS (b) NS (c) CS
(b) NS
Bishop’s ring is due to the diffraction of light by fine particles of (a) water (b) dust (c) ice
(b) dust
The radius of the Bishop’s ring is about (a) 32° (b) 22° (c) 42°
(b) 22°
Superior Mirage occurs in marked (a) Lapse (b) Isothermal (c) Inversion
(c) Inversion
Inferior Mirage occurs when there is (a) Lapse (b) Isothermal (c) Inversion
(a) Lapse
Corona are formed due to the ……….. of light (a) Refraction (b) Diffraction (c) Scattering
(b) Diffraction
Corona are formed due to light, passing through (a) Mist only (b) Fog only (c) small water or ice particles only (d) Any one of all these
(c) small water or ice particles only
Halo is produced by (a) Refraction (b) Diffraction (c) Scattering
(a) Refraction
Halo is produced when light passes through (a) water particles (b) ice crystals (c) both
(b) ice crystals
Halo occur in the cloud (a) AS (b) NS (c) CS
(c) CS
Halo is luminous ring of ……….. radius (a) 32° (b) 22° (c) 42°
(b) 22°
Halo round the sun shows a pure clear ……….. on the outside (a) Red (b) Yellow (c) Violet
(c) Violet
Halo signifies predominance in the cloud of (a) Supercooled water drops (b) Ice crystals (c) Both
(b) Ice crystals
The cloud which cause Halo has ……….. chances of ice accretion (a) negligible (b) maximum (c) medium
(b) maximum
Sometimes a halo with a radius of ……….. is observed, called Large Halo (a) 32° (b) 42° (c) 22°
(b) 42°
Halo occurs from ……….. cloud (a) Low (b) Medium (c) High
(c) High
When super cooled water drops and ice particles co-exist the ice crystals grow at the expense of the water drops because (a) Saturation vapour pressure over water drops is less than over the ice crystals (b) Saturation vapour pressure over the ice crystals is less than over water drops (c) The ice crystals convert into water drops
(b) Saturation vapour pressure over the ice crystals is less than over water drops
The clouds whose tops extend well above the freezing level are called (a) Warm Clouds (b) Cold Clouds (c) Moderate Clouds
(b) Cold Clouds
The clouds whose tops do not extend to the freezing level are called (a) Warm Clouds (b) Cold Clouds (c) Moderate Clouds
(a) Warm Clouds
Coalescence Theory explains occurrence of rainfall from (a) Warm Clouds (b) Cold Clouds (c) Both types of Clouds
(c) Both types of Clouds
Ice crystal Theory explains occurrence of rainfall from (a) Warm Clouds (b) Cold Clouds (c) Both types of Clouds
(b) Cold Clouds
Giant Nucleus Theory explains occurrence of rainfall over (a) Maritime areas (b) Inland areas (c) Hilly areas
(a) Maritime areas
Very heavy precipitation as showers over a short period is called (a) Flash floods (b) Cloud Burst (c) Orographic Rain
(b) Cloud Burst
Rain shadow area is on the ……….. of the mountain range (a) Top (b) Windward side (c) Leeward side
(c) Leeward side
Sleet is a mixture of (a) Hail & Snow (b) Rain & Snow (c) Frozen Rain
(b) Rain & Snow
Rainfall in the tropics is more in (a) Winters (b) Summers (c) Post monsoon
(b) Summers
Rainfall in the tropics is more in the (a) Morning (b) Afternoon (c) Night
(c) Night
Rainfall in the temperate latitudes is more in (a) Winters (b) Summers (c) Spring
(a) Winters
Over J&K and western Himalayas Rainfall is more in (a) Winters (b) Summers (c) Post monsoon
(a) Winters
Rainfall over coastal areas is more in the (a) Evening (b) Afternoon (c) Night & early morning
(c) Night & early morning
Areas to the ……….. of western Ghats of India are rain shadow areas (a) W (b) S (c) E
(b) S
A sudden rise in the level of rivers or streams causing floods is called (a) Cloud Burst (b) Catchments flooding (c) Flash Floods
(c) Flash Floods
Artificial rain making is also termed as (a) Simulation (b) Cloud seeding (c) Nucleation
(b) Cloud seeding
Fog can be dispersed for a short period by artificial stimulation (a) True (b) False
(a) True
Showery precipitation occurs from (a) NS (b) AC (c) CB
(c) CB
A day is called Rainy day when rainfall in 24 hr is ……….. mm or more (a) 1.5 (b) 2 (c) 2.5
(c) 2.5
Hoar frost occurs on airframe in clear air when the temperature of airframe is (a) below the frost point (b) frost point (c) just above the frost point
(a) below the frost point
In clouds at temperatures below 0°C an aircraft may encounter icing of the type (a) only Glazed (b) only Rime (c) intermediate between these two
(c) intermediate between these two
Opaque Rime ice is (a) Light porous (b) Solid (c) Mixture of porous and solid
(c) Mixture of porous and solid
Rime is formed by freezing of ………. supercooled water droplets on airframe when aircraft is flying through clouds (a) Small (b) Large (c) Medium
(a) Small
Glazed ice is formed by freezing of ………. supercooled water droplets on airframe when aircraft is flying through clouds (a) Small (b) Large (c) Medium
(b) Large
The ………. ice poses serious aviation hazard (a) Rime (b) Hoar Frost (c) Glazed
(c) Glazed
Airframe icing occurs below 0°C. Its probability of occurrence decreases progressively below -20°C, as at lower temperatures the proportion of super-cooled water drops in a cloud (a) Increases (b) Decreases (c) Does not change
(b) Decreases
CI, CS and CC clouds consist mostly ice crystals. Icing hazard is therefore (a) Maximum (b) Medium (c) Negligible
(c) Negligible
AS, NS consist of supercooled water drops and ice crystals in varying proportion ………. icing is possible. (a) Maximum (b) Light or moderate (c) Negligible
(b) Light or moderate
In AC clouds ………. icing is possible in mountainous areas (a) Light (b) Moderate (c) Severe
(b) Moderate
In TCU icing may range from light to severe type at least up to ………. level. (a) -40°C level (b) 30°C level (c) -20°C level
(a) -40°C level
In CB icing may range from light to severe type up to -20°C level. Below this temperature severe icing is (a) not significant (b) significant (c) maximum
(b) significant
Liquid water content is an important factor in icing. As the maximum water concentration is in clouds near ………. maximum ice formation in clouds may also be expected around that level. (a) -25°C level (b) -20°C level (c) -15°C level
(b) -20°C level
Carburetor icing occurs when air from intake passes through a venturi (choke) and causes expansional cooling and vaporization of fuel. Serious icing can occur at extreme temperatures (a) 13°C (b) 30°C to -10°C (c) 20°C
(b) 30°C to -10°C
………. occurs in a moist cloudless air on an aircraft surface having temp. below 0°C, due to sublimation of water vapour onto feathery ice crystals. (a) Rime (b) Glazed (c) Hoar Frost
(c) Hoar Frost
………. occurs in St, Sc, Ac, Cu, Ns at temperature -10 to -40°C and in Cb at temperature -20 to -40°C (a) Rime (b) Glazed (c) Hoar Frost
(a) Rime
In clouds ………. occurs when a wide range of water drop sizes are present at temperatures between 0°C and -40°C (a) Rime (b) Glazed (c) Mixture of rime and clear ice
(c) Mixture of rime and clear ice
………. occurs in AS, NS, AC and towering CU or CB between 0°C and -20°C, in warm front below 0°C, especially if the aircraft has rapidly descended from a colder region. (a) Glazed (b) Rime (c) Mixture of Rime and Clear ice
(c) Mixture of Rime and Clear ice
When fog freezes on parked aircraft it produces ………. (a) Hoar Frost (b) Rime (c) Clear ice
(a) Hoar Frost
Icing ………. the stalling speed appreciably (a) Decreases (b) Increases (c) Does not increase/decrease
(b) Increases
The condition necessary for the formation of a thunderstorm are (a) Steep lapse rate, strong winds (b) Shallow lapse rate, adequate supply of moisture (c) Steep lapse rate, adequate supply of moisture and trigger action
(c) Steep lapse rate, adequate supply of moisture and trigger action
Hail is most likely to fall from a cloud (a) Having layers (b) Composed of Ice crystals (c) Having strong vertical development
(c) Having strong vertical development
Norwesters are (a) The western disturbances which affect NW India (b) Severe thunderstorms which occur over NE India during hot weather period (c) Severe thunderstorms which occur over Peninsula during hot weather period
(b) Severe thunderstorms which occur over NE India during hot weather period
Duststorm usually occurs over NW India during (a) Post-monsoon (b) Winter (c) Pre-Monsoon
(c) Pre-Monsoon
A ‘mature’ thunderstorm has (a) updraft only (b) downdraft only (c) updrafts and downdrafts
(c) updrafts and downdrafts
Aircraft icing is most favourable in the cloud which have temperatures ranging between (a) -20° C and -40° C (b) 0° C and -20° C (c) below -40° C
(b) 0° C and -20° C
A short duration, showery precipitation is associated with (a) ST (b) AS (c) CB
(c) CB
Hail is (a) Solid precipitation commonly occurring over the mountainous regions in winters (b) Frozen or partly frozen rain falling from sheet type of clouds (c) Solid precipitation falling from a deep convective cloud
(c) Solid precipitation falling from a deep convective cloud
The most hazardous cloud for aviation is (a) CB (b) CU (c) NS
(a) CB
The life of a Cb cell is usually (a) 7 to 8 hrs (b) 3 to 4 hrs (c) 2-3 hr
(c) 2-3 hr
Generally the severest activity of a, heat type, TS is for (a) 2 hrs (b) 30 to 45 min (c) 3 to 4 hr
(b) 30 to 45 min
Norwesters occur during (a) Jan-Feb (b) Mar-May (c) June-Sep (d) Oct – Dec
(b) Mar-May
Norwesters occur during (a) Winter (b) Hot weather (c) Monsoon (d) Post Monsoon
(b) Hot weather
Norwesters affect (a) N India (b) Bihar, Orissa and Assam (c) Central India
(b) Bihar, Orissa and Assam
The trigger action may take place due to (a) Clear night sky, no wind (b) Orographic lifting (c) high pressure
(b) Orographic lifting
Norwesters normally occur during (a) Mornings (b) Afternoons (c) Nights
(b) Afternoons
Norwesters originates over (a) Chota-Nagpur hills (b) Deccan Plato (c) Khasi hills
(a) Chota-Nagpur hills
Andhi (blinding storms) occur generally over (a) S India (b) N India
(b) N India
Wind speed in Light DS is (a) 25 kt (b) 30 kt (c) up to 21 kt
(c) up to 21 kt
The diameter of Microburst is (a) less than 4 km (b) less than 2 km (c) less than 6 km
(b) less than 2 km
The diameter of Macroburst is (a) < 4 km (b) 4 km or more (c) > 8 km
(b) 4 km or more
For detecting precipitation a Radar wavelength in the range (a) 30 to 200 mm (b) 400-500 mm (c) 600-700 mm
(c) 600-700 mm
For airborne radars wavelength generally used (a) 20 mm (b) 40 mm
(a) 20 mm
The wavelength of TS detection X band radar is (a) 10 mm (b) 20 mm
(a) 10 mm
The wavelength of storm detection S band radar is (a) 50 mm (b) 100 mm (c) 200 mm
(c) 200 mm
Over plains TS mostly occur during the (a) afternoon (b) night (c) early morning
(a) afternoon
Over valley and foot hills TS generally occur during (a) afternoon (b) night & early morning
(b) night & early morning
Over the sea TS are more frequent (a) afternoon (b) night
(b) night
The life of Mesoscale Convective Complex TS is (a) 2-3 hr (b) 3-4 hr (c) 6 to 24 hr
(c) 6 to 24 hr
Loud peals of thunder, frequent flashes of lightning, moderate or heavy showers accompanied by light hail with maximum wind speed 15-40 kt is classified as (a) Light TS (b) Moderate TS (c) Severe TS
(b) Moderate TS
For a severe TS one of the requirements is strong Wind Shear (a) Horizontal (b) Vertical (c) Slant
(b) Vertical
Severe TS cells are tilted (a) in vertical (b) to the South (c) to the North
(c) to the North
When flying through an active TS, lighting strikes are most likely (a) Above 5000 ft and under the anvil. (b) In the clear air below the cloud in rain (c) In the temperature band between +10° and - 10°C (d) At or about 10000 ft
(c) In the temperature band between +10° and - 10°C
Hazards of the mature stage of TS Cell include lighting, turbulence and: (a) Microburst, wind-shear and anvil (b) Icing, microburst and WS (c) Icing, drizzle and microburst (d) WS, hail and fog
(b) Icing, microburst and WS
Hail grows by (a) freezing as it leaves the cloud (b) up and down forces in CU cloud (c) collision with supercooled water drops
(c) collision with supercooled water drops
The airmass which originates at sea in high Latitudes is called (a) Polar maritime (b) Tropical maritime
(a) Polar maritime
The airmass which originates over equatorial region is (a) Warm and dry (b) Warm and Moist
(b) Warm and Moist
If the advancing cold front is colder than the cool air mass of the warm front, the advancing cold front undercuts and lifts both the warm and cool air masses of the warm front. This is (a) Warm Occlusion (b) Cold Occlusion
(b) Cold Occlusion
The airmass which originated over land area located in polar region is (a) Warm and dry (b) Warm and Moist (c) Cold and dry
(c) Cold and dry
If a warm airmass overtakes a cold air mass, it is called (a) Cold Front (b) Warm Front
(b) Warm Front
At warm front (a) Warm air overtakes the cold air (b) Cold air undercuts the warm air
(a) Warm air overtakes the cold air
The conditions are always unstable at a (a) Cold Front (b) Warm Front
(a) Cold Front
Sometimes Line squall occurs about 100-300 km ahead of a (a) Warm front (b) Cold front
(b) Cold front
Precipitation occurs over a belt of 30-50 km on both side of front (a) Cold front (b) Warm front
(b) Warm front
Cold front moves at …. the speed of a warm front moves (a) Same (b) Double (c) Half
(b) Double
Line Squalls occur …… of Cold front (a) Ahead (b) Behind (c) At the
(a) Ahead
Fronts are associated with (a) Tropical cyclone (b) Monsoon Depression (c) Extra-tropical Cyclones
(c) Extra-tropical Cyclones
CB, Roll-type clouds, SC, AC with embedded CB are associated (a) Cold front (b) Warm front
(b) Warm front
The surface of discontinuity between the Polar Ely and the temperate Wly is called (a) Equatorial Front (b) Tropopause (c) Polar Front
(c) Polar Front
The air mass which originates from sea area located in lower Lat is (a) Warm and Dry (b) Warm and Moist (c) Cold and Moist
(b) Warm and Moist
WDs approach India as (a) Cols (b) Occluded Fronts (c) Highs
(b) Occluded Fronts
Maximum WDs occur in (a) Summers (b) Post Monsoon (c) Winters
(c) Winters
Ahead of a warm front the surface wind (a) Backs & weakens (b) Veers & strengthens (c) Backs & strengthens
(b) Veers & strengthens
On approach of a Warm Front temperature (a) Rise (b) Remain same
(a) Rise
CI, CS, AS, NS, ST in sequence are associated with the front (a) Warm (b) Cold (c) Occluded
(a) Warm
During the passage of a Cold Front wind (a) Suddenly become squally (b) Back and weaken (c) Veer and of moderate strength
(a) Suddenly become squally
Visibility is poor in a Warm Front (a) Ahead (b) Ahead & During (c) After & During
(b) Ahead & During
Fog occurs in Cold Front (a) Ahead (b) During (c) After
(b) During
WD is a ………. front (a) Cold (b) Warm (c) Occluded
(a) Cold
FZRA and FZFG occur ………. of a warm front (a) Ahead (b) During (c) After
(b) During
Precipitation ceases after the passage of a front (a) Cold (b) Warm (c) Occluded
(a) Cold
During the approach of a Warm Front wind (a) Backs (b) Veers (c) Does not change
(a) Backs
A WD with two or more closed isobars, at 2 hPa interval, it is termed as (a) Troughs in Westerlies (b) Western Depression (c) Western Cyclone
(a) Troughs in Westerlies
A WD originate over (a) Baluchistan (b) Caspian sea (c) Mediterranean, Caspian and Black Seas
(c) Mediterranean, Caspian and Black Seas
Induced lows develop to the ………. of a WD (a) N (b) S (c) NE
(b) S
The arbitrary lower limit of jet core velocity has been assigned by WMO as (a) 60 kt (b) 60 m/s (c) 70 m/s
(b) 60 m/s
Jet stream has (a) one maxima (b) one or more maxima (c) only two maxima
(b) one or more maxima
The vertical wind shear in a Jet stream is about (a) 5m/s/ km (b) 6m/s/km (c) 8m/s/km
(b) 6m/s/km
Compared to horizontal wind shear the vertical wind shear in a Jet stream is (a) weaker (b) stronger (c) same
(b) stronger
In a jet stream, the path of the maximum speed is known as (a) Core (b) Axis (c) Jet streak
(a) Core
The wind speed along the axis of a jet stream is always (a) Uniform (b) Not uniform
(a) Uniform
Along the axis of a jet stream there are centres of high speed winds, these are called (a) Jet streaks (b) Core (c) Axis
(a) Jet streaks
In a wavy jet the Jet streaks are located over or near the (a) Ridge (b) Trough (c) Southerly
(b) Trough
Sub-tropical Jet Stream (STJ) is (a) Westerly (b) Easterly (c) Southerly
(a) Westerly
The normal position of Sub-tropical Jet Stream is (a) 30° N (b) 27° N (c) 35° N
(b) 27° N
The southern most position of STJ is in February is (a) 22° N (b) 20° N (c) 18° N
(c) 18° N
The STJ affects India from (a) Jun to Jul (b) Oct to May (c) Aug to Sep
(b) Oct to May
STJ has a layered structure. There are often two layers of jet core (a) S (b) N (c) SW
(b) N
The STJ strengthens (a) Northwards (b) Upstream (c) Downstream
(b) Upstream
At and near STJ the temperature gradient is very (a) Small (b) Large (c) Moderate
(b) Large
Vertical wind shear in STJ is greater ………. the core (a) above (b) below (c) along
(b) below
The TJ prevails over the Indian Peninsula from (a) Sep to Oct (b) May to Jun (c) Jun to Aug
(a) Sep to Oct
The TJ is located over the Indian Peninsula, approximately at (a) 13° N (b) 18° N
(b) 18° N
The TJ is located over Indian, approximately at a height of (a) 15–16 km (b) 12–13 km (c) 11–12 km
(a) 15–16 km
The TJ is strongest in (a) July – Aug (b) Sep – Oct (c) June
(b) Sep – Oct
In the TJ the wind shears are much ………. than the STJ (a) more (b) less (c) same
(b) less
TJ is (a) Westerly (b) Easterly (c) Southerly
(b) Easterly
A jet stream can be recognized by (a) High level dust (b) High Pressure (c) Streaks of CI (d) Lenticular clouds
(a) High level dust
Flying at right angles to a jet stream with falling pressure you will experience (a) Wind from left (b) Increasing head wind (c) Increasing tail wind (d) Wind from right
(b) Increasing head wind
When and where tropical jet stream occurs (a) All year along equator (b) In Middle East in summers (c) In summers over SE Asia and Central Africa
(c) In summers over SE Asia and Central Africa
The airmass which originates at sea in high Latitudes is called (a) Polar maritime (b) Tropical maritime
(a) Polar maritime
The airmass which originates over equatorial region is (a) Warm and dry (b) Warm and Moist
(b) Warm and Moist
If the advancing cold front is colder than the cool air mass of the warm front the advancing cold front undercuts and lifts both the warm and cool air masses of the warm front This is (a) Warm Occlusion (b) Cold Occlusion
(b) Cold Occlusion
The airmass which originated over land area located in polar region is (a) Warm and dry (b) Cold and dry
(b) Cold and dry
If a warm airmass overtakes a cold air mass it is called (a) Cold Front (b) Warm Front
(b) Warm Front
At warm front (a) Warm air overtakes the cold air (b) Cold air undercuts the warm air
(a) Warm air overtakes the cold air
The conditions are always unstable at a (a) Cold Front (b) Warm Front
(a) Cold Front
Sometimes Line squall occurs about 100-300 km ahead of a (a) Warm front (b) Cold front
(b) Cold front
Precipitation occurs over a belt of 30 – 50 km on both side of front (a) Cold front (b) Warm front
(b) Warm front
Cold front moves at ………… the speed of a warm front moves (a) Same (b) Double
(b) Double
Fog occurs in Cold Front (a) Ahead (b) During
(b) During
WD is a ……….. front (a) Cold (b) Warm
(a) Cold
FZRA and FZFG occur ………… of a warm front (a) Ahead (b) During
(b) During
Precipitation ceases after the passage of a front (a) Cold (b) Warm
(a) Cold
During the approach of a Warm Front wind (a) Backs (b) Veers
(a) Backs
A WD with two or more closed isobars at 2 hPa interval it is termed as (a) Troughs in Westerlies (b) Western Depression
(b) Western Depression
A WD originate over (a) Baluchistan (b) Caspian sea
(b) Caspian sea
Induced lows develop to the ………. of a WD (a) N (b) S
(b) S
For mountain waves to form there should be flow of air across the ridge generally within ……….. of the perpendicular to the ridge (a) 30° (b) 45° (c) 60°
(b) 45°
